After marrying a wealthy husband, she gave birth to a long-awaited son. Yui, who was at the peak of her happiness, decided to go back to her husband's parents to show her child. However, what Yui saw there was her mother-in-law, who decides all the rules in the Kawagoe household... Yui felt uncomfortable because her husband was also at the mercy of her mother-in-law, and while she was milking her breasts, which were full of breast milk, her father- in-Yui No. "We are no longer needed in this house."Yui accepted her father-in-law's breast milk massage out of loneliness...